Home / 38,431.56-53,035.64-21,435.38

Finding the Fourth Proportional to 38,431.56, 53,035.64 and 21,435.38

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Solution

The fourth proportional to 38,431.56, 53,035.64 and 21,435.38 is: 29,580.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,431.56 : 53,035.64 = 21,435.38 : x
  2. Step 2: Convert to fraction form
    38,431.56/53,035.64 = 21,435.38/x
  3. Step 3: Cross multiply
    38,431.56x = 53,035.64 × 21,435.38
  4. Step 4: Simplify right side
    38,431.56x = 1,136,839,422.75
  5. Step 5: Solve for x
    x = 1,136,839,422.75/38,431.56
  6. Step 6: Final answer
    x = 29,580.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.